Portable excavating-machine.



J. H. GARR. PORTABLE EXGAVATING MACHINE. APPLICATION FILED APB. 113, 1912.

I?. Patented Dec. 16, 191.3.l

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N Avbmmumwj @d I iwi Il JOHN II. CARR, or' ALHAMBRA, CALIFORNIA, AssIGNoR. or ONE-HALF To HOWARD E. MARSH, or rALMs, CALIFORNIA..

PORTABLE EXCAVATING-MACHINE.

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Specication of Letters Patent.

Patented Dec. 16, 1913.

Application led pril 13, 1912. Serial No. e90,58 8.

To @ZZ whom t may conce/,vu

Be it known that I, Jox-1N H. CARR, a citizen of the United States, residing at the city of Alhambra,- State of California, have invented a new and useful Port-able Excavating-lllachine, of which the following is a specification.

This invention relates to excavating mechanism particularly intended for digging ditches, said mechanism being mounted'on a self-propelled vehicle which is moved along as thedigging of the ditch progresses. An object of this invention is to provide improved means for moving the excavating mechanism to and from the operative position and adjust-ing t-he same for digging ditches of different depths. Other objects and advantages may hereinafter appear.

Referring to the accompanying drawings, which illustrate the invention, Figure 1 is a view partly in side elevation and partly in mid section of an excavating machine embodying the invent-ion the view including the rear portion of a vehicle upon which the excavator proper is mounted; Fig. 2 is a transverse section on line 2 of Fig. 1, -including also the engine and driving connections of the excavator proper; ig. 3 is an enlarged sectional detail of the device for raising and lowering from the ground th! framewhich carries the excavating implements; Fig. l is an-enlarged broken end view partly in section;Fig. 5 is an enlarged face View of one of the excavating buckets.

Referring in detail to the drawings, upon the framel 2 of al self propelled vehicle the forward portion only of which is shown in the drawings, is mounted a main transverse shaft 3 which forms a bearing for a chain- Carrying frame having an upward extension 4 and a downward extension 5, said extensions 4 and 5 of said frame projecting at an obtuse angle to each other as best shown in Fig. l. Each extension of said frame consists of two side series of excavating buckets 6 traveling between the side pieces of the upper extension 4t of said frame but projecting beyond the edges of the side pieces of the lower extension of said frame which are closer together. The upper extension thas moune between its side pieces a shaft -8 upon which are mounted the two sprockets 9 and 10 around which chains 7 travel. Adjustable boxes 9 and 10 are provided for said shaft 8. Upon the downwardly 'extending side pieces of the extension 5 of the frame is likewise mounted shaft l1 carrying sprockets 12 and 13 fixed to said. shaft to support the lower run of said chains 7. Shaft 3 carries Sprocket wheels 7 which are engaged by the chains 7. An idle wheel 14 mounted upon a standard 15 serves to keep the chains 7 tight. The lower shaft 11, to which is secured the lower sprocket wheels 12 and 13, is driven by a chain 16 which passes over a sprocket wheel 17 fixed to said shaft 11 midway between the chain-driving sprocket wheels 12 and 13. Said chain 16 is driven by a -sprocket wheel 18 fixed to the main driving shaft 3. By this construction the pieces as shown in Fig. 4, a'

.power is effectively applied close to the point of resistance.

In orderY to provide for tilting the frame members 4 and 5 into a more inclined position so asto lift the digging mechanism from the ground preparatory to ymoving the machine to'another l'ield of operation, each of the upper frame pieces 4 is provided'with a rearwardly projecting bracket 21, a rod 22 extending from one to the other of the brackets thus formed. To said rod 22 is pivotally fastened the upper end of a forwardly inclined non-rotatable adjusting shaft 23. The lower portion of said shaft 23 extends through and has a screw threaded engagement with a rotatable adjusting collar or sleeve 24 provided with a hand wheel 25. A collar 26 supports said sleeve 2e, lsaid collar being pivotally supported on trunnions 27 which rest in standards 28 carried by the vehicle frame 2.

A spout 29, supportedon brackets 29 and 29 carried by the frame members 4, receives the soil as it is discharged at the top of the conveyer and diverts it to one side of the machine.

Shaft 3 is supported by bearing sleeves 3a which are supported by channel irons 3b. Bearing members 3c unite the frame members 4 and 5 and provide a bearing surface torest upon the sleeves 3a.' Said bearing members 3c (see Fig. 4) fit in between and space apart the upper frame members 4l; and lower frame members 5 thus forming a substantial means for supporting the bearing sleeves 3a and driving shaft 3 which has its bearings in said sleeves 3a. rlhis construci'tion makes a rirm substantial double frame for supporting the digging means during operation.

To one end of shaft 3 is secured a bevel gear 30 which meshes with bevel pinion gear 31 made fast to a transmission shaft 32, said transmission shaft being driven from driving shaft 33 through" mit-er gears 34 and 35.

' Driving shaft 33 is driven by engine or motor 36 through pinion 37 and vgear38.

Buckets 6 are armed with digging teeth 68L which areA preferably cast in one piece therewith. In the embodiment of the invention illustrated in the drawings, the

1. In an excavating machine, a vehicle body, a frame mounted thereon, a shaft to pivot-ally support saidl frame, said frame having an-upwardly extending portion consisting of two side pieces and a downwardly' extending portion having two side pieces which are placed nearer together than those of the upper section of said frame, the upper and lower sections of the frame overlapping each other, spacing members secured between the inner and outer frames where they overlap, the aforementioned shaft having its bearings within said spacing members, an endless connection carried by said frame, a series of buckets carried said connection, said buckets traveling b albng the edges of the lower side pieces and passing between the upper side pieces, means to drive said connection, and means to adjust said'frame to and from the digging position. 2. In an excavating machine, a vehicle body, a frame mounted thereon, a shaft to pivotally support said frame, said frame having an upwardly -extending portion consisting of two side pieces and a downwardly extending portion having two side pieces which are lplaced nearer together than those of the upper section of said frame, the upper and lower sections ofthe frame overlapping each other, spacing members secured between the inner and outer frames where they overlap, the aforementioned shaft having its bearings within said spacing members, an endless connection carried by said frame, by said connection, means to drive said connection, and means to move said frame to and from the digging position.

In testimony whereof I have hereunto signed my lname in the presence of two subscribing witnesses at Los Angeles, in the county of LosY Angeles and State of California, this 6th day of April 1912.

JOHN H. CARR. Witnesses: Guo. R. NORTON,

ALBERTy H. MERRILL.

a series of buckets carried 

